Question

What is plasma membrane ? ​

Answer 1

Answer:

A microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or enclosess a vacuble, and regulates the passage of molecules in and out of the cytoplasm.

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Answer 2

All cells are surrounded by a plasma membrane. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membrane is also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell.